Most important?

vrooms bees and price

Balance of vrooms first, bees second. Oh, and safety.

power, material, ratings, shape

Ratings and reviews are important because a product can look really nice on a website, but you don't really know what it's like unless you hear from someone who has seen it in person and used it.

Vrooms and bees. If it has 4 or more bees I just can't get it because I would never be able to use it since I live with people. I really like to have at least 3 vrooms too. I've pretty much stopped getting anything with less than that.